Greasing apparatus



April 5, 1938. E. PIQUERZ GREASING APPARATUS Filed Deo. 24, 1936 4Sheets-Sheet 2 April 5, 193s. E. PIQUEREZ' GREAs ING APPARATUS 4sheets-sheet 5 -Filed Deo. 24, 1956 11 ..1 laiminis.:El:nini:iinniililliiiiit..D

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April 5, 1938. E. PIQUEREZ 2,113,333

GREASING APPARATUS A Filed Dec] 24, 1936 4 sheets-sheet 4 w TW: l

/ lol Patented Apr. 5, 1938 *UNITED STATES PATENT OFFICE GREASINGAPPARATUS Emile Piquerez, Saint Cloud, France Application December 24,1936, Serial No. 117,654 In France December 31, 1935 6 Claims.

' combination, the cartridge has been closely surrounded by the rigidwall of the reservoir or the pump cylinder, according to whether thereservoir is independentl or is a part of the pump cylinder, andencloses in most cases a piston applied under pressure against thesurface of the lubricant. In general, such apparatus has not givensatisfactory results, as the cartridge has been only incomplete- 1yemptied owing to lthe fact that responsive to the pressure, the weaklysupported wall of the 'cartridge was deformed and became creased andimprisoned small masses of lubricant which never reached the outlet.

Thepresent invention has for its object to overcome this drawback. Forthis purpose it essentially consists in the fact that thecartridge is nolonger provided with an outer casing, but with an inner reinforcementformed by the Wall of the reservoir Ior the pump cylinder itself fromwhich the lubricant is expelled, either directly to the outside, ortowards a high pressure cylinder, the transfer of the lubricant from thecartridge to said cylinder being automatically effected when onepenetrates into the other. A

Theapparatus according to the invention can In the apparatus of the rstclass, the frame of -the apparatus is provided with a base to supportthe cartridge from which the upper cover has been previously removed andwhich is provided with an opening at its lower part, whereas the pumpcylinder or reservoir, which is provided with a single cover at theupper part, is removable from said frame and can be inserted in saidcartridge, and has means for connecting it to the frame.

In a particularly advantageous embodiment, the cover of the pumpcylinder or of the reservoir is provided with an overlapping crownprovided witli a threaded collar, or with any other appropriate meanswhich can be connected with a covering casing of the frame which extendsfrom the base of the frame around the cartridge. The delivery systemcarried by the removable pump cylinder cover can be of any kind. It cancomprise a sufficiently large piston delivering directly at lowApressure into an outlet nipple car rled by the base of the apparatus,or it can com prise a follower piston which is free to be driven by asupply of air under pressure, said piston effecting the filling of anapparatus in which a plunger piston is displaceable and which is guidedand supported by the-upper cover of the removable pump cylinder.

In the case of a reservoir which is independent v of the pump, theremovable body of the reservoir .lo

will be provided with a follower piston which is free to be driven bycompressed air, so that it drives the lubricant towards the pumpcylinder.

The apparatus of the second type is principally characterized by thecombination of a pump or reservoir cylinder xedly mounted on the base ofthe apparatus and open at its upper part, of a cartridge tted onto saidpump cylinder, and of an outer casing secured to the cover andscrewpiston or pistons, whereas the delivery nipple and optionally thehigh pressure chamber are integral with or are secured to the base ofthe apparatus.

In a modified embodiment, the cover does not carry any delivery memberand the pump cylinder is displaceable relatively to the follower anddelivery piston mounted at the end of the delivery nipple. Theinventionprovidesv furthermore means for ensuring hermeticity between the pumpcylinder or the reservoir and the outlet of the cartridge, in anapparatus of the first kind.

For this purpose, the lower end of the pump body or of the reservoir isadapted to ilatten the lower closure beading of the cartridge in agroove provided in the base of the apparatus, so that the said beadingserves as a joint.

This arrangement is applicable with a cartridge and a pump or reservoirbody which are cylindrical. However, according to an improved embodivment, the lower part of the cartridge is slightly conical and the lowerpart of the pump or reservoir body is amply bevelled so as to accuratelyerigage in the inner angle of the cartridge cover to cause a rationalcrushing of the entire beading.

This device can be advantageously completed by providing at the lowerpart of the pump or reservoir 'body and inside same, a ring which isadapted to stop the follower piston at the end of its stroke and also tocooperate in attening ing onto the base, the cover carrying the delivery20 v as Fig. 1 but-provided with a high pressure delivery system. Y

Fig; 3 is a section showing the application of the same type ofapparatus to a compressed air delivery apparatus.

Fig. 4 is a section of an apparatus of the rstmentioned type having anindependent reservoir.

Fig. 5 is a section of an apparatus of the second type, that is to sayconstructed for the cartridge to be fitted onto the pump cylinder orreservoir body.

Fig. 6 is a vertical section of an apparatus of the second type.

Fig. 7 isa section of an improved system for ensuring hermeticitybetween the cartridge .and the lubricant outlet.

Fig. 8 is a sectional view of an apparatus according to Fig. 2 modied toinclude the means for sealing the cartridge against the support,according to Fig. '7.

Inthe embodiment of Fig. 1, the invention is applied, for example, to alow pressure delivery apparatus The apparatus comprises a base I onwhich is mounted a casing 2 concentrically with a circular groove 3provided in said base. Said groove is adapted to receive the beading 4`formed by the seam of the cover 5 and of the side wall of the greasecartridge 6. ,A suillcient space allowance is provided to enable thecar. tridge to be easily placed in position on its support, after havingremoved its upper cover from the -said cartridge and having removed theclosure of its lower orifice 1. The orifice 'I places the cartridge incommunication with the outlet nipple 6 of the pump.

At its upper part, the casing 2 has for example a thread 2a to receive ascrewed cover 3 which forms the upper cover of the pump casing which isilxed thereto in any appropriate manner.

The casing Il has no lower cover and its outer diameter is slightly lessthan the inner diameter ofthe cartridge 6. The lower edge of its wallcan advantageously bevelled at loa as shown, to form a scraper. At thetop the casing I is provided with an air vent hole, its capacity below`said hole being at least equal to that of the cartridge.

The cover 9 has at its 'center a tapped hub in which the rod Il of thepiston I2 screws, which can be operated by an outer handle.

The lining of the apparatus is effected as follows: The cover S and thepump casing I0 are disconnected from the frame and the piston I2 ispositioned at top 'of the casing Il above the air vent i3.

After having removed the upper cover and the closure of the orifice 1 ofthe cartridge, the cartridge is placed in position' on the base I, sothat the beading 4 is accommodated in the groove 3. Then the lower edgeof the pump casing I0 is held above the cartridge and said casing isprogressively pusheds into the cartridge. The grease containedin thecartridge then penetrates gradually into the pump body, driving out theair through the hole I3. As it moves downwards the bevelled edge Ilascrapes the grease and when it reaches the bottom of its stroke,correponding to the screwing of the cover, it flattens the beading 4 inits groove thereby ensuring hermeticity between the cartridge and theoutlet nipple.. A few turns ofthe pump. screw are then given to bringthe piston l2 into ,contact with the grease and the apparatus is ready.to deliver at low pressure.

Fig. 2 shows the application of the same arrangements to a high pressuregreasing apparatus. A

In this case, a connection vI4 supplies compressed air above the piston|21 which is a simple follower piston adapted to slide freely on the rodI which itself slides through the cover 9a, the lower extension of saidrod forming a high pressure piston. Saidpiston is displaced in the highpressure cylinder i6 provided on the base la, and having inlet ports i1..Beyond said cylinder is mounted a delivery valve I8. f,

Without changing the characteristic arrangements of the invention, athird apparatus can be constructed by eliminating the connection i4, thefollower piston being in that ca'se displaced under the influence ofatmospheric pressure.

'.I'he'mounting, as regards the cartridge and the pump body, is effectedas before with the sole difference that when the pump cylinder is aboutto be entered into the cartridge, the follower piston is placed at thelower part of said cylinder, so that it is pushed upwards by the grease,as the cylinder I0 is pushed in. During this operation, the air outletI9 remains open.

Fig. 3 shows the application of the same arrangements to an apparatus inwhich the disof the grease pump. The cylinder 26 is pressed against thepartition 24 by a nut 21. In said cylinder the piston 28 isdisplaceable,and is directly connected to a compressed air driven piston29. A hermetic packing 30 is lodged in theA opening of the partition 24;said packing being pressed against the end of the cylinder 26 by aspring'3l which bears with its other end on the' rear face of thecompressed air driven piston 29.

A double acting valve controls the inlet and exhaust of the air. Saidvalve is housed in an extension 32 of the body of the apparatus. Inthis. portion of the part are provided various housings, in which isplaced double seat 33'held in place by a hollownut 34. A valve 3 5 urgedby a spring 36 is pressed against the lower part of said seat.. Atthe'upper part of the double seat 33 is provided the seat of a needlevalve `31; said needle valve being extended by a rod 36 of smallerdiameter than the central duct of the part 33 and which, when at rest,comes into contact with the head of the valve 35 in such a manner thatwhen the needle valve 31 is seated, the valve 35 is open, andconversely.

'Ihe ducts provided in the middle of the part 33 communicate through theduct 39 with the end of the air driven cylinder, whereas the housbearson an operating handle 4I carried by a grasp handle 42. A retractingspring 43 tends to' hold the needle valve constantly away from its Seat.

` vAt theV opposite part ofthe grasp handle, the

The base 43 has a groove 49 for housing the beading-4 of the greasecartridge 6 and it carries the casing 50. The cover 5| carries thereservoir body 52 in which the follower piston 53 is displaceable. Saidcover fits into the casing and fits over a hollowrod 54 vscrewed intohole 41. T'he locking of the cover is eected by a nut 55.

'Ihe cartridge being in position and a source of compressed air beingconnected to the orifice of the plug 34, the operation is as follows:

`to open.

When the handle,4| is depressed, the'needle valve 31 is applied onitsseat, whereas the extension 38 bears on the valve 35 and compels it Thecompressed air thus penetrates into the duct 39 and into the duct 48.Through .the first it reaches the air cylinder and pushes the pistonforward compressing the spring 3|. At the same time the air introducedthrough the duct 48 and the hole 41 penetrates into the duct 56 of therod 54, lifting the ball 51 and through vthe orifices 60, flows betweenthe cover 5| and the piston'53 compel-ling the latter to drive thegrease above it.

The grease is thus forced through the duct 45.

and reaches the ports 46 of the grease cylinder. When the handle 4| isreleased, the valve 35 closes again, cutting'off the supply ofcompressed air, whereas the needle valve 31 places the duct 38 incommunication with the atmosphere through the orifice 40. The airwhichis in the cylinder escapes by this path.

During this period of exhaust, the air introduced behind the piston 53cannot escape since 'drives out this lubricant beyond the pump 6|towards the place where it is to be used. At the same time a certainquantity of air is again introduced behind the piston 53 of the greasereserv voir.

Fig. 4 shows the application of the same characteristic arrangements toagreasing apparatus having an independent reservoir.

The body 80 of .the apparatus in which is formed the high pressurecylinder 8| has at one side a base 82 provided with a central orifice 83which communicates with said cylinder and means suchv as a threadedcollar for xing the casing,r 84 thereto. Said base also has a groove. 85for housing the beading 4 of the cartridge 6. The cylinder 86 of thereservoir is dimensioned to t Within the cartridge 6 and the casing 84in the same manner as the cylinder |0 ofthe preceding embodiments withrespect to the cartridge 0 and the casing 2.' It is secured to a cover81 which screws onto the top of the casing 84 and has an air orifice 88adapted to enable the action 'of atmospheric pressure to be exerted onthefree follower piston 89.

as-in the embodiment shown and described in connection with Fig. 2.

Fig. 5 shows a first embodiment of an apparatusof the second type, thatis to say adapted to be mounted in the reverse manner to the precedingones, by fitting the cartridge Yonto the A pump body; said apparatusbeing for example of the low pressure type.

Thebase |00 in this embodiment carries the pump body |0| and receivesthe casing |02 which is secured to the coverl03 when the cartridge 6,which is v turned upside down after removing 'one of its covers, isplaced in position, the outer diameter of the body |0'I beingdimensioned as before, so that the inner wall of the cartridge isscraped by the edge |0|a.

The cover |03 is screwed and soldered on the upper end of the casing|02. It has a bulge |04 of which the inner wall |04a comes into align-Said flange is formed for example by the juxtaposition oftwothicknesses:that of the body and that-of the flange of the cover, pinched togetherby fasteners spaced at intervals. In i this manner, in spite of thenecessity for aligning the wall |04'a with the wall |0|b, a preferablyoutwardly bevelled projection |05 canr. be made integral with the cover,to push backV and hold the flange 4a outside the path of the piston |06.The latter, which when at rest is lodged in' the cover, is preferablyofv the rigid type, that is to say, does not have a flexible shank,becausev of the empty space to be passed between the two walls |04a,|0|b.

washers |08, the leather washer being slightly larger than the cork discso as to rub on the walls.

This apparatus is provided with a plunger piston |09 adapted tocooperate with the high pressure cylinder ||0 formed in the base |00, todeliver through the valve It comprises for example aA cork disc |06, aleather washer |01, and 'two metal 'I'he mounting and filling operationis effected in the following manner:

formed by the casing |02 and the cover |03. .The

whole arrangement is then turned over .on the body`| 0| and is graduallypushed in until the edge of the end of the cartridge which is at theupper part, bears against the top of the body 0|, which is finallyobtained' byfscrewi'ng the casing on 'the base. pushed, it is actuatedseveral times lightly, to drive out the air if necessary, and when thegrease reaches the cylinder |'I0 the apparatus is ready to operate.

The arrangements accordingto the invention, of the apparatus of Fig. 5necessitate, asr has just been seen, the removal of the second cover ofthe cartridge.

'The arrangements s hown in Fig. 6 obviate this necessity.

On the cover or base |20 is fixed the pump body |2.|and is screwed thecasing |22 which is secured atits upper part to the cover |23. latter isadapted to hold the beading 4 ofthe cartridge 6 in cooperation with .thetop of the The piston' |09 is then.

The.

to be supplied, the delivery being effected by pressing on the actualbody of the apparatus.

In the embodiments of YFigs. 5. and 6, the casing could obviously bedisconnected from the cover and fixed beforehand on the base, but under`these circumstances the pushing in of the cartridge would be veryinconvenient. would be positioned last.

A number of other modifications are obviously included in the scope ofthe invention, since the latter can be applied to all apparatus having asuitable reservoir, whether said reservoir forms a pump cylinder orwhether it is independent of the latter.

In the foregoing, it has been mentioned that the hermeticity between thecartridge and the lubricant outlet could be obtained by crushing theperipheral beading of the. cover between the supporting base, or thecover, and the end of the pump or reservoir body. v

To obtain the'crushing of said beading under completely rationalconditions, it will be advantageous to use the arrangement -of Fig. 7which essentially consists in providing at-the end of the pump orreservoir body 13|, a long bevel 13| and in disengaging the beading |32,from the inside,

'The cover and in providing on the cartridge immediately above the end aconical portion |33 corresponding to said bevel. Outside the cartridge,the base could also have a conical bearing portion |34. It will bereadily seen that owing to this arrangement, the sharp end of the bodywill engage with certainty in the inner Aangle of thebeading and willpush the latter towards the joint wall |35.

The device can be completed by mounting at the bottom of the body ill, aretaining ring or cord |36 for the follower piston, which have anoblique face |31 suitably directed to cooperate in crushing the beading|32. Such an arrangement could moreover be used with the precedingdevices. Flg. 8 illustrates the arrangementapplied toanapparatusotherwise similar to that of Figi 2. A

What I claim is: 1. In a greasing apparatus, a grease of iiexiblematerial having side walls and an end wall connected by an inwardlyrolled seam, a

. frame having a support for supporting said end wall of the greasecartridge, acasing surrounding the sides of the cartdge, a cylinderslidable into the cartridge fitting closely against said side walls, andengaging the rolled seam and flattening it against the support to sealthe periphery of the end, said end wall having a central opening, andthe support 'discharge communicating with said opening and means forpressing grease from said cartridge through said opening.`

2. In 'a greasing apparatus, a grease cartridge of flexible materialhaving side walls and an end wall, said walls connected by an inwardlyrolled seam, the side walls being conical in the vicinity of the endwall, a supporting base for supporting the end wall of the cartridge, acasing surrounding the side walls of the cartridge and being formedconically adjacent the conical portion of the cartridge, said supportingbase having an annular groove extending therearound cartridge- `body |2Iand to provide a bearing race |234:

adjacent the seam of the cartridge for receiving said seam, a cylinderslidable within the cartridge from the end opposite the Asupport andclosely ttiug the side walls of the cartridge, said cylinder beingbevelled at its inner 'end tov conform with the conicity of thecartridge, the inner end of said cylinder having an inwardly` extendingring adapted to engage the seam and press the seam into saidgroove toform a. seal between the outer edge of the end wall of the cartridge andthe support, said end of the cartridge having a central dischargeopening, said support having.

a discharge passage, and means for forcing grease from said opening tosaid passage. A

3. In combination: a supporting base, a casing forming a cover at theupper part of `said reservoir, a low pressure piston displaceable insaid cylinder and a plunger piston passing through the cover of thereservoir cylinder and the low pressure piston.

4. In combination: a reservoircylinder of a greasing apparatus openatits upper part, a

` base for said cylinder, a cartridge of lubricant made of paper and thelike ttedvonto said cylinder, an outer casing fitted onto said cartridgeand adapted to be removablyxed to the afore- Vsaid base. a cover securedto the upper part of the casing, a follower piston lodged in said cover,a plunger piston passing .through said cover and said'follower pistonand removable as a unit with said cover, said follower piston and thecasing; and a high pressure cylinder, and a delivery valve both in thebase of the reservoir cylinder.

5. Supply reservoir -for a greasing apparatus l comprising: a metalcasing, a base for said casing; a cartridge of lubricant made of paperand the like provided with a lower cover and havingno uppercover', theside wall of said cartridge having a conical portion adjacent saidcover, said conical portion being connected .to said cover by afastening forming a projecting beading;V said cartridge being engaged insaid casing with its lower cover pressed against the base of the casing;and the base of the casing having a groove to receive the projectingbeading of the cartridge of lubricant, a. metal reservoir body adaptedto be pushed into said cartridge in contact with its wall, the end ofsaid body having an -outer bevel corresponding to the conicity of thepart of the side wall of the cartridge adjacent the cover of the latterso that said end of the reservoir body .can completely crush the beadingof the cartridge when said body is fully pushed l in place.

6. In combination: a metal casing and abase for said casing; a highpressure cylinder and a delivery valve in said base; a cartridge oflubricant made of paper or the like provided with a lower cover andhaving no upper cover, the side walls of said cartridge having a conicalportion adjacent .said cover, said=conical portion being connected tosaid cover by a' fastening forming a projecting beading; 'said cartridgebeing engaged in said casing with its lower cover pressed againstthe'base of the casing; and the base of the casing having a groovetoreceive the projecting bead# l5 tlxed on said base, a high pressurecylinder in ing oi' the cartridge' o'f lubricant; a metal reservoir bodyadapted to be pushed into said cartridge in contact with its WaIL'theend of said A Abody having an outer bevel corresponding to thecartridge.

reservoir body, saidvring being adapted to co-v operate ior iiatteningthe beading of the cartridge; an upper cover secured to the reservoirbody, said cover having a flange adapted to be removably connected withthe top of the casing when thereservoir body is fully pushed in place inthe cartridge, said body having an orice .to allow air to escape when itis pushed into said Emma Pr'QUEREz. 10

